Seequa Chameleon -- "Non-masked interrupt" and dead floppies

So, i've got a ~25 year old Seequa Chameleon portable in my
retrocomputing stuff, and the poor thing's A: and B: drives don't work
(the A: drive conked out last night, and the B: drive has been dead
since before it fell into my posession). In a machine without a hard
drive, this is obviously a bad thing. also, the thing likes to give me
"Non-masked Interrupt" messages, without even telling me for what or
where the NMI occurred. How would i track down the cause of the NMI,
and does the Seequa Chameleon take standard half-height 5 1/4 drives?

 

Tne original IBM PC used the NMI to signal a memory error. So that may be
the cause of that.

No idea about the drives. Most of them used a screw-driven machanism to
move the heads - the screw became encrusted with dirt and grease and
gummed up. Try cleaning the screw up and applying some light grease (e.g.
white lithium). Or see what else has failed (e.g. drive belt).